Once the PoweRocks is charged, how long with it keep the charge if you don't need to use it very often?
4160
Not quite sure. You'll have to experiment for yourself. Since I don't use it regularly, I just always give it a full charge whenever I need to take it out when using it occassionally.
118965
I haven't actually timed the longevity of the charge, but I routinely use my computer for 2 1/2 to three hours without running out of a charge.
987475
I haven't unplugged it long enough to give an honest answer but it initially appeared to hold a decent charge. My computer is at least 4 years old though.
1294745
It all depends on what kind of load your putting on the raspberry pi, also depends if you overclocked it or not... on idle I can't see it lasting more than a day. The powerbank is meant for giving your device that extra push, not as a main power source.
1309068
I've had mine for about 3 months and still holds its charge. At 100%, lasts 3 1/2 hours and that's when i have my laptop fan and gaming mouse plugged in.
1735021
I let mine charge for about three hours the first time I used it and it lasted for well over an hour. After that I usually leave in on my desk solar cells up for two or maybe three hours per day between meetings etc, and it rarely runs out of charge. Personally it has totally changed the way I use my iPad, now I use it for much more content creation not just consumption, and I take my laptop far fewer places.
276345
As a "moderate" user, I charge mine about once a week. It lasts impressively long.
405036
I'm routinely using it for 3 to 4 hours and still has a charge. Guess I could probably go 4 1/2 to 5 hours. Definitely was a good purchase - at least for how I use my computer.
1383219
about thirty minutes, but it only holds a charge for thirty minutes because of its size. plan on leaving it plugged in if your power card will stay in the unit. mine needs a rubber band to hold the power card in. suggestion keep looking.
147779
Tough to say. My old battery had to be charged daily and since I got this one I only have to plug it in every 4 or 5 days. One of the keys is to let it discharge down to 15% or so before recharging it.
1564801
To my knowledge, it's not possible. However, I did read somewhere that each charge is good for 40 to 50 hours of operation, so after about 15 to 20 hours of operation, I simply charge it back up toward assuring that I'm never surprised. As you're probably aware, the charging light goes off when the KB is fully charged. Hope this helps.
1065463
I generally get around 4.5 hours. Most of the time I use the AC power. I use a hard drive not a solid state.
1178246
I usually have it plugged in, but on a some 4 - 5 day trips, it's fine without recharging -- no loss of power/speed.
1288373
I have no issues with this battery. I run my laptop for hours at a time typically, so I keep it plugged in. If you were to run as little as possible, I'd say it would probably last an hour or two.
1270271
I'd not assume it's safe to leave it plugged in unless you see a statement saying that it is. In fact many manuals will say "Don't charge for more than 24 hours" or "Don't overcharge" showing that you shouldn't leave it on. If your thinking of that so it has a routine "fresh charge" that you don't need to think about doing regularly I'd get a timer that turns it on for just 15 minutes a day and/or a regulated power supply (like the Schumacher PC-6 or Coleman powerchill cooler AC supply) that won't "overcharge" it.
539497
I've mostly used it on USB, but from time to time it comes unplugged and I dont notice til days later that it's still running. I've never attempted to use it for 80 continuous hours, but I'd say it lives atleast 60 before it needs a charge.
1119927
It lasts for about a month using it twice daily for 2 minutes....the power does decline a little by the end of the month. So, if you want a strong charge all the time maybe charge it every 2-3 weeks?